Re: [release] Boost 1.84.0 Beta 1 Release Candidate 1 is available

From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2023-11-16 15:40:54

On 11/16/23 18:32, Peter Dimov via Boost wrote:
> Andrey Semashev wrote:
>>> Looks like it is, as the problem seems confined to Filesystem.
>>
>> So far I don't see this as a Boost.Filesystem bug. The missing symbols
>> (at least, those which were posted here earlier) are standard C++
>> symbols, which by default should be linked automatically by the
>> compiler. If the compiler doesn't do that, this is a compiler bug as far
>> as I'm concerned. So the right place to report it is:
>>
>> https://github.com/llvm/llvm-project/issues/
>>
>> Incidentally, I have reported a similar problem before here:
>>
>> https://github.com/llvm/llvm-project/issues/60578
>>
>> and it looks like it hasn't been fixed yet.
>>
>> As for a workaround, I suspect the problem can be worked around by
>> manually adding linking with the standard library that defines those
>> missing symbols. For example, `operator delete` is defined in libc++abi,
>> so you may fix the problem by adding `linkflags=c++abi` to `b2` command
>> line.
> 
> But the problem only appears to affect Filesystem; the other libraries seem
> to link fine. There must be some difference that triggers it.

I suspect, this is related to `-Wl,--no-undefined` that Boost.Filesystem
adds.